[Bug tree-optimization/83517] Missed optimization in math expression: (x+x)/x == 2

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83517

--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Mon Jan  8 08:16:19 2018
New Revision: 256328

URL: https://gcc.gnu.org/viewcvs?rev=256328&root=gcc&view=rev
Log:
2018-01-08  Richard Biener  <rguenther@suse.de>

        PR middle-end/83517
        * match.pd ((t * 2) / 2) -> t): Add missing :c.

        * gcc.dg/pr83517.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/pr83517.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/match.pd
    trunk/gcc/testsuite/ChangeLog